And she didn't leave any doubt in the process, not unless Duff is known for playing tonsil hockey with guys who are her boyfriend.
That's right: Duff and Walsh confirmed their romance via a steamy photo of the twosome kissing.
"Date night with J," Duff wrote as a caption, just in case anyone somehow thought this to be a friendly smooch. News reported Duff and Walsh were "casually dating." But it sure looks like things have heated up between the two, even as the temperature outside has dropped.
"We've known each other for a really long time and he's a great guy and we have a lot of fun together," Duff said in September on Good Day New York of Walsh, adding: "It's nice to have that excitement in my life." Duff, of course, made headlines in the past for her personal life after she filed for divorce from Mike Comrie.
While neither half of the ex-couple will receive spousal support, the celebrity gossip website added this winter that Duff was forced to shell out a one-time payment of ,408,786 to Comrie in order to cover the financial side of their split.
But it doesn't seem as if Duff is harping on the past. And she has a new handsome man on her arm (and on her mouth) to help her look forward.
The two originally split way back in January of 2014, but the official paperwork was not completed until February of this year.During that time, there were plenty of rumors about Duff and Comrie getting back together.